Relativistic magnetic reconnection in laser laboratory for testing an emission mechanism of hard-state black hole system

Law, King Fai Farley; Abe, Yuki; Morace, A.; Arikawa, Yasunobu; Sakata, Shohei; Lee, S.; Matsuo, Kazuki; Morita, Hiroki; Ochiai, Yugo; Liu, C.; Yogo, Akifumi; Okamoto, Ken‐ichi; Golovin, D.; Ehret, M.; Ozaki, T.; Nakai, M.; Sentoku, Y.; Santos, J. J.; d’Humières, E.; Korneev, Ph.; Fujioka, Shinsuke

doi:10.1103/physreve.102.033202

Cited by 24 publications

(12 citation statements)

References 35 publications

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“…An increase of nonthermal electrons near 10 MeV is reported. In recent experiment with Gekko and a micro-coil, on the other hand, relativistic reconnection was demonstrated by increasing B in Equation (3) with the coil [29] . Although a laser intensity of 10 14 -10 16 W/cm 2 was used, the well-designed coil generates a magnetic field of 3000 T. It is reported that power-law energy spectra are observed for both protons and electrons in the near-relativistic region.…”

Section: Magnetic Reconnection Experimentsmentioning

confidence: 98%

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Recent progress of laboratory astrophysics with intense lasers

Takabe

Kuramitsu

2021

High Pow Laser Sci Eng

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Thanks to a rapid progress of high-power lasers soon after the birth of laser by T. H. Maiman in 1960, intense lasers have been developed mainly for studying scientific feasibility of the laser fusion in the world wide. Inertial confinement fusion with intense laser has attracted attention as a new future energy after two oil crises from 1970s -1980s. From the beginning, the most challenging physics is known to be the hydrodynamic instability to realize the spherical implosion to achieve more than 1000 times the solid density. A lot of studies have been carried out theoretically and experimentally on the hydrodynamic instability and resultant turbulent mixing of compressible fluids. During such activities in laboratory, the explosion of supernova SN1987A was observed in the sky on February 23, 1987. The x-ray satellites have revealed that the hydrodynamic instability is a key issue to understand the physics of supernova explosion. After strong interaction of laser plasma researchers and astrophysicists, the laboratory astrophysics with intense lasers has been proposed and promoted around the end of 1990s. The original subject was mainly related to hydrodynamic instabilities. However, after two decades of the laboratory astrophysics research, we can now find a diversity of its research topics. It has been demonstrated that a variety of nonlinear physics of collisionless plasmas can be studied in laser ablation plasmas in the last decade theoretically and experimentally. In the present paper, we shed light on the recent ten topics intensively studied in laboratory experiments. Brief review is given by citing recent papers. Then, modeling cosmic-ray acceleration with lasers is reviewed in a following session as a special topic to be the coming main topics in laboratory astrophysics research.

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Section: Magnetic Reconnection Experimentsmentioning

confidence: 98%

“…demonstrating by increasing B in Eq. (3) with the coil [29] . Although using laser intensity 10 14−16 W/cm 2 , the welldesigned coil generates magnetic field of 3,000 T. It is reported that power law energy spectra are observed for both of protons and electrons in near relativistic region.…”

Section: Magnetic Reconnection Experimentsmentioning

confidence: 99%

Recent progress of laboratory astrophysics with intense lasers

Takabe

Kuramitsu

2021

High Pow Laser Sci Eng

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“…When a short laser pulse interacts with an extended target, a short discharge pulse induced by the interaction propagates along the target [15] almost with the speed of light. To reach a quasi-stationary regime with short laser pulses, reduction of the target perimeter so it becomes less than the laser pulse length was proposed [16,17,18]. A reduced size of the coil in OMFG makes the effective magnetized volume quite small, so the principal question addressed here is whether the target with the coil perimeter longer than the pulse duration may produce a quasi-stationary magnetic field.…”

Section: Conversion Of Laser Light To Magnetic Field In Laser-driven Coilsmentioning

confidence: 99%

Machine Learning Analysis of Quasi-Stationary Magnetic Fields Optically-Driven by Short Laser Pulses

Kochetkov

Bukharskii

Ehret

et al. 2021

Preprint

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Optical generation of kilo-tesla scale magnetic fields enables prospective technologies and fundamental studies with unprecedentedly high magnetic field energy density. A question is the optimal configuration of proposed setups, where plenty of physical phenomena accompany the generation and complicate both theoretical studies and experimental realizations. Short laser drivers seem more suitable in many applications, though the process is tangled by an intrinsic transient nature. In this work, an artificial neural network is engaged for unravelling main features of the magnetic field excited with a picosecond laser pulse. The trained neural network acquires an ability to read the magnetic field values from experimental data, extremely facilitating interpretation of the experimental results. The conclusion is that the short sub-picosecond laser pulse may generate a quasi-stationary magnetic field structure living on a hundred picosecond time scale, when the induced current forms a closed circuit.

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“…The principal physical mechanism of these methods is based on magnetic flux compression (MFC) [10] using hollow cylindrical structures and pre-seeded magnetic fields. To date, the highest magnetic field experimentally observed remains on the kilotesla (kT) order [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Laser scaling for generation of megatesla magnetic fields by microtube implosions

Shokov

Murakami

Honrubia

2021

High Pow Laser Sci Eng

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Microtube implosions are a novel scheme to generate ultrahigh magnetic fields on the megatesla order. These implosions are driven by ultraintense and ultrashort laser pulses. Using two-and three-dimensional particle simulations where megatesla-order magnetic fields can be achieved, we demonstrate scaling and criteria in terms of laser parameters such as laser intensity and laser energy to facilitate practical experiments toward the realization of extreme physical conditions, which have yet to be realized in laboratories. Microtube implosions should provide a new platform for studies in fundamental and applied physics relevant to ultrahigh magnetic fields.

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Relativistic magnetic reconnection in laser laboratory for testing an emission mechanism of hard-state black hole system

Cited by 24 publications

References 35 publications

Recent progress of laboratory astrophysics with intense lasers

Recent progress of laboratory astrophysics with intense lasers

Machine Learning Analysis of Quasi-Stationary Magnetic Fields Optically-Driven by Short Laser Pulses

Laser scaling for generation of megatesla magnetic fields by microtube implosions

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